https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100057
--- Comment #32 from cqwrteur <unlvsur at live dot com> --- (In reply to cqwrteur from comment #31) > (In reply to Jonathan Wakely from comment #30) > > (In reply to cqwrteur from comment #29) > > > I really want a fix to the script. Thank you !!! > > > > This is too vague to do anything about. > > > > Be precise. > > compile gcc things like with --target=x86_64-elf. then use > --disable-hosted-libstdcxx build those headers without any libc, not even > newlib since newlib might implement some things which are not appropriate. > > Better addon x86_64-elf -mno-red-zone multilibs too. This not only allows C++ to run in baremetal, but also allows libcs themselves to be implemented with C++. Today the cross compiler build process is like this: binutils-gdb -> gcc without headers but only build libgcc -> libgcc -> libc -> rebuild gcc -> libgcc -> libstdc++ -> other libs. In the future, it should be binutils-gdb -> gcc without headers but only build libgcc + disable-hosted libstdc++ -> libgcc -> libc -> rebuild gcc -> libgcc -> libstdc++ -> other libs. This will solve the boostrapping problems for libcs like mlibc which is written in C++20.
